Geosynthetics Reinforced Two-Staged Crash Wall Design and Construction on the 96th Ave NE Extension across CP Rail Project

Hardwin ZH Zhen

In the proceedings of: GeoVancouver 2016: 69th Canadian Geotechnical Conference

Session: FOUNDATION DESIGN - I Retaining Walls & Spread Footings

ABSTRACT: To mitigate the risk of collision load from a derailed train, a 450 mm thick, 5 m high crash wall was required to protect two abutments of a six-lane bridge across three CP rail tracks. Behind the crash wall, a standalone SierraScape® system was mechanically connected to the Cast-in-Place crash wall to release the lateral load. Above the crash wall, a 6.93 m high MSE wall faced with 1.5 mx1.5 m modular panels was used to support two abutments of the bridge structure. From Fall of 2010 to late 2012, Nilex managed the design, supply and installation of the 1,250 m² MSE wall along 96 Ave NE in Calgary AB. This paper will discuss the key design factors, construction sequence and practical project management tips on a combination of different Tensar MSE systems. With a 100-year design life, the Maximum design height was 11.93 m for the abutment wall. With 20 CSP-cased piles on each abutment spaced at 2,979 mm, it left an effective coverage ratio of 50% behind the abutment.

RÉSUMÉ: et 5m de hauteur a été requis pour protéger les culées d'un pont à six voies traversant les voies ferrées de CP (Canadian Pacific). Derrière le mur de collision, un système autonome SierraScape a été branché mécaniquement au mur de collision de béton coulé en place afin de libérer la charge latérale. Au-dessus du mur de collision, un autre mur en remblai mécaniquement stabilisé (MSE) de 6.93 m de hauteur à paroi verticale formé par des panneaux modulaires de 1.5 mx1.5 m a été utilisé pour soutenir deux culées de la structure du pont. De l'automne 2010 à la fin de 2012, Nilex a géré la conception, la fourniture et l'installation de la paroi MSE de 1,250 de la construction, et des conseils pratiques de gestion de projets dans une combinaison de différents systèmes MSE de Tensar. Avec une durée de vie de 100 ans, la hauteur maximale de conception du mur de la culée est 11.93 et il y a dans chaque culée 20 pieux CSP espacés 2,979 mm en laissant un ratio de couverture effective de 50% derrière les pieux.

Access this article:
Canadian Geotechnical Society members can access to this article, along with all other Canadian Geotechnical Conference proceedings, in the Member Area. Conference proceedings are also available in many libraries.

Cite this article:
Hardwin ZH Zhen (2016) Geosynthetics Reinforced Two-Staged Crash Wall Design and Construction on the 96th Ave NE Extension across CP Rail Project in GEO2016. Ottawa, Ontario: Canadian Geotechnical Society.

@article{3669_0721150353,author = Hardwin ZH Zhen,title = Geosynthetics Reinforced Two-Staged Crash Wall Design and Construction on the 96th Ave NE Extension across CP Rail Project,year = 2016}